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-rw-r--r--man/systemd-nspawn.xml29
-rw-r--r--src/nspawn/nspawn.c82
2 files changed, 90 insertions, 21 deletions
diff --git a/man/systemd-nspawn.xml b/man/systemd-nspawn.xml
index bec233c1ca..08b0457d16 100644
--- a/man/systemd-nspawn.xml
+++ b/man/systemd-nspawn.xml
@@ -249,6 +249,27 @@
</varlistentry>
<varlistentry>
+ <term><option>-L</option></term>
+ <term><option>--file-label=</option></term>
+
+ <listitem><para>Sets the mandatory
+ access control (MAC) file label to be
+ used by tmpfs file systems in the
+ container.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>-Z</option></term>
+ <term><option>--process-label=</option></term>
+
+ <listitem><para>Sets the mandatory
+ access control (MAC) label to be used by
+ processes in the container.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
<term><option>--uuid=</option></term>
<listitem><para>Set the specified UUID
@@ -456,6 +477,14 @@
btrfs snapshot.</para>
</refsect1>
+ <refsect1>
+ <title>Example 6</title>
+
+ <programlisting># chcon system_u:object_r:svirt_sandbox_file_t:s0:c0,c1 -R /srv/container
+# systemd-nspawn -L system_u:object_r:svirt_sandbox_file_t:s0:c0,c1 -Z system_u:system_r:svirt_lxc_net_t:s0:c0,c1 -D /srv/container /bin/sh</programlisting>
+
+ <para>This runs a container with SELinux sandbox labels.</para>
+ </refsect1>
<refsect1>
<title>Exit status</title>
diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c
index f0e7b0619f..c91f6cce21 100644
--- a/src/nspawn/nspawn.c
+++ b/src/nspawn/nspawn.c
@@ -41,6 +41,9 @@
#include <sys/socket.h>
#include <linux/netlink.h>
#include <sys/eventfd.h>
+#if HAVE_SELINUX
+#include <selinux/selinux.h>
+#endif
#include "sd-daemon.h"
#include "sd-bus.h"
@@ -77,6 +80,8 @@ static char *arg_directory = NULL;
static char *arg_user = NULL;
static sd_id128_t arg_uuid = {};
static char *arg_machine = NULL;
+static char *process_label = NULL;
+static char *file_label = NULL;
static const char *arg_slice = NULL;
static bool arg_private_network = false;
static bool arg_read_only = false;
@@ -117,25 +122,27 @@ static int help(void) {
printf("%s [OPTIONS...] [PATH] [ARGUMENTS...]\n\n"
"Spawn a minimal namespace container for debugging, testing and building.\n\n"
- " -h --help Show this help\n"
- " --version Print version string\n"
- " -D --directory=NAME Root directory for the container\n"
- " -b --boot Boot up full system (i.e. invoke init)\n"
- " -u --user=USER Run the command under specified user or uid\n"
- " --uuid=UUID Set a specific machine UUID for the container\n"
- " -M --machine=NAME Set the machine name for the container\n"
- " -S --slice=SLICE Place the container in the specified slice\n"
- " --private-network Disable network in container\n"
- " --read-only Mount the root directory read-only\n"
- " --capability=CAP In addition to the default, retain specified\n"
- " capability\n"
- " --drop-capability=CAP Drop the specified capability from the default set\n"
- " --link-journal=MODE Link up guest journal, one of no, auto, guest, host\n"
- " -j Equivalent to --link-journal=host\n"
- " --bind=PATH[:PATH] Bind mount a file or directory from the host into\n"
- " the container\n"
- " --bind-ro=PATH[:PATH] Similar, but creates a read-only bind mount\n"
- " --setenv=NAME=VALUE Pass an environment variable to PID 1\n",
+ " -h --help Show this help\n"
+ " --version Print version string\n"
+ " -D --directory=NAME Root directory for the container\n"
+ " -b --boot Boot up full system (i.e. invoke init)\n"
+ " -u --user=USER Run the command under specified user or uid\n"
+ " --uuid=UUID Set a specific machine UUID for the container\n"
+ " -M --machine=NAME Set the machine name for the container\n"
+ " -S --slice=SLICE Place the container in the specified slice\n"
+ " -L --file-label=LABEL Set the MAC file label to be used by tmpfs file systems in container\n"
+ " -Z --process-label=LABEL Set the MAC label to be used by processes in container\n"
+ " --private-network Disable network in container\n"
+ " --read-only Mount the root directory read-only\n"
+ " --capability=CAP In addition to the default, retain specified\n"
+ " capability\n"
+ " --drop-capability=CAP Drop the specified capability from the default set\n"
+ " --link-journal=MODE Link up guest journal, one of no, auto, guest, host\n"
+ " -j Equivalent to --link-journal=host\n"
+ " --bind=PATH[:PATH] Bind mount a file or directory from the host into\n"
+ " the container\n"
+ " --bind-ro=PATH[:PATH] Similar, but creates a read-only bind mount\n"
+ " --setenv=NAME=VALUE Pass an environment variable to PID 1\n",
program_invocation_short_name);
return 0;
@@ -173,6 +180,8 @@ static int parse_argv(int argc, char *argv[]) {
{ "machine", required_argument, NULL, 'M' },
{ "slice", required_argument, NULL, 'S' },
{ "setenv", required_argument, NULL, ARG_SETENV },
+ { "process-label", required_argument, NULL, 'Z' },
+ { "file-label", required_argument, NULL, 'L' },
{}
};
@@ -181,7 +190,7 @@ static int parse_argv(int argc, char *argv[]) {
assert(argc >= 0);
assert(argv);
- while ((c = getopt_long(argc, argv, "+hD:u:bM:jS:", options, NULL)) >= 0) {
+ while ((c = getopt_long(argc, argv, "+hD:u:bL:M:jS:Z:", options, NULL)) >= 0) {
switch (c) {
@@ -247,6 +256,20 @@ static int parse_argv(int argc, char *argv[]) {
break;
+ case 'L':
+ file_label = strdup(optarg);
+ if (!file_label)
+ return log_oom();
+
+ break;
+
+ case 'Z':
+ process_label = strdup(optarg);
+ if (!process_label)
+ return log_oom();
+
+ break;
+
case ARG_READ_ONLY:
arg_read_only = true;
break;
@@ -396,6 +419,7 @@ static int mount_all(const char *dest) {
for (k = 0; k < ELEMENTSOF(mount_table); k++) {
_cleanup_free_ char *where = NULL;
+ _cleanup_free_ char *options = NULL;
int t;
where = strjoin(dest, "/", mount_table[k].where, NULL);
@@ -418,11 +442,22 @@ static int mount_all(const char *dest) {
mkdir_p(where, 0755);
+#ifdef HAVE_SELINUX
+ if (file_label && (streq_ptr(mount_table[k].what, "tmpfs") ||
+ streq_ptr(mount_table[k].what, "devpts")))
+ options = strjoin(mount_table[k].options, ",context=\"", file_label, "\"", NULL);
+ else
+#endif
+ options = strjoin(mount_table[k].options, NULL);
+
+ if (!options)
+ return log_oom();
+
if (mount(mount_table[k].what,
where,
mount_table[k].type,
mount_table[k].flags,
- mount_table[k].options) < 0 &&
+ options) < 0 &&
mount_table[k].fatal) {
log_error("mount(%s) failed: %m", where);
@@ -1491,6 +1526,11 @@ int main(int argc, char *argv[]) {
} else
env_use = (char**) envp;
+#if HAVE_SELINUX
+ if (process_label)
+ if (setexeccon(process_label) < 0)
+ log_error("setexeccon(\"%s\") failed: %m", process_label);
+#endif
if (arg_boot) {
char **a;
size_t l;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-09 17:19:04 +0000